X\u1ed5 s\u1ed1 hi\u1ec7n nay \u0111ang lo\u1ea1i h\u00ecnh \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi ch\u01a1i tham gia tr\u00ean to\u00e0n qu\u1ed1c. B\u1edfi n\u00f3 c\u00f3 nh\u1eefng c\u01a1 c\u1ea5u gi\u1ea3i th\u01b0\u1edfng v\u00f4 c\u00f9ng h\u1ea5p d\u1eabn. V\u00e0 m\u1ed7i n\u0103m, c\u01a1 c\u1ea5u gi\u1ea3i th\u01b0\u1edfng l\u1ea1i n\u00e0y l\u1ea1i c\u00f3 s\u1ef1 thay \u0111\u1ed5i v\u00e0 l\u00ean xu\u1ed1ng nh\u1ea5t \u0111\u1ecbnh. V\u00e0 t\u1ea1i m\u1ed7i v\u00f9ng, m\u1ed7i mi\u1ec1n l\u1ea1i c\u00f3 nh\u1eefng c\u01a1 c\u1ea5u gi\u1ea3i th\u01b0\u1edfng kh\u00e1c nhau. V\u1eady th\u00ec ngay sau \u0111\u00e2y h\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 c\u01a1 c\u1ea5u gi\u1ea3i th\u01b0\u1edfng x\u1ed5 s\u1ed1 c\u00e1c mi\u1ec1n tr\u00ean to\u00e0n qu\u1ed1c hi\u1ec7n nay.<\/em><\/p>\n X\u1ed5 s\u1ed1 mi\u1ec1n b\u1eafc l\u00e0 lo\u1ea1i h\u00ecnh x\u1ed5 s\u1ed1 ki\u1ebfn thi\u1ebft \u0111\u01b0\u1ee3c ph\u00e1t h\u00e0nh \u0111\u1ea7u ti\u00ean \u1edf n\u01b0\u1edbc ta t\u1eeb n\u0103m 1962. Sau nhi\u1ec1u n\u0103m \u0111\u1ebfn nay, c\u01a1 c\u1ea5u gi\u1ea3i th\u01b0\u1edfng x\u1ed5 s\u1ed1 mi\u1ec1n b\u1eafc c\u0169ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i t\u1eebng b\u1eadc. V\u00e0 sau \u0111\u00e2y l\u00e0 gi\u1ea3i th\u01b0\u1edfng x\u1ed5 s\u1ed1 mi\u1ec1n b\u1eafc trong 3 n\u0103m g\u1ea7n \u0111\u00e2y.<\/p>\n Tham kh\u1ea3o: L\u1ecbch quay x\u1ed5 s\u1ed1 3 mi\u1ec1n<\/em><\/p>\nGi\u1ea3i th\u01b0\u1edfng x\u1ed5 s\u1ed1 mi\u1ec1n b\u1eafc 3 n\u0103m g\u1ea7n \u0111\u00e2y<\/strong><\/span><\/h2>\n